diff --git a/book.asciidoc b/book.asciidoc
index df9cba50..763a5e73 100644
--- a/book.asciidoc
+++ b/book.asciidoc
@@ -10,4 +10,6 @@ include::ch02.asciidoc[]
 
 include::ch03.asciidoc[]
 
-include::ch04.asciidoc[]
\ No newline at end of file
+include::ch04.asciidoc[]
+
+include::ch05.asciidoc[]
\ No newline at end of file